| 摘要 |
A method and apparatus for breaking corners of wood members prior to the plastic coating of the same is disclosed. In accordance with the method, the wood members such as fence rails and posts are forced between a system comprising four spring mounted rollers, each of which forcibly engages one corner of the wood member and crushes the same in the desired profile. The rollers may be shaped to provide a radius type profile or other desired profile, or alternatively, may be substantially flat to break the 90 degree corner into two more gentle 45 degree corners. In general, the amount of the crushing is controlled by the spring pressure forcing the rollers into the corners, and is relatively self controlling because of the increase in the width of the crushed area as the amount of crushing increases. Such crushing removes the sharp corner on the rails and posts so that upon the subsequent plastic extrusion coating process, the tendency of the plastic coating to contract laterally will not cause the plastic coating to unnecessarily thin at the corners of the wood members, or to be cut thereby.
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